3 How does this relate to [[OpenAFS]]? [[OpenAFS]] uses Kerberos to perform strong authentication for clients connecting to the AFS filespace. If you're new to Kerberos, you should take a look at the Kerberos FAQ located at <http://www.nrl.navy.mil/CCS/people/kenh/kerberos-faq.html>. For the impatient, a quick list of useful Kerberos-related terms will be available at [[KerberosTerms]].

5 Note that there are two versions of Kerberos in wide usage. The latest is [[KerberosV]], but AFS, for historical reasons, uses a modified version of Kerberos 4 (see [[KaServer]]). However, AFS can be integrated into a [[KerberosV]] realm, and in fact is highly suggested for any new installations of AFS. See [[SettingUpAuthentication]].

7 Installing [[KerberosV]] along with [[OpenAFS]] will provide the basis for many other very cool features, such as a single repository for all authentication information for an administrative domain, integration with the Windows 2000/XP login mechanism, and even single-sign-on capability. Note that the further down you get in that list, the harder things become. :)

9 The installation documentation on the [[OpenAFS]] web site unfortunately does not include any information on integrating AFS into a [[KerberosV]] realm. (Work on install document &amp; gotchas page later)

25 If you already have a working AFS cell using [[KaServer]], check out Derrick Brashear's document for converting from the [[KaServer]] to [[HeimdalKTH]] [here](http://lost-contact.mit.edu/afs/net/project/afs32/andrew.cmu.edu/usr/shadow/ka2heim.txt): <file:/afs/andrew.cmu.edu/usr/shadow/ka2heim.txt>

29 - Setting up [[OpenSSH]] to use [[KerberosV]] authentication: you can either use PAM to authenticate people (boring) or you can add the patches at <http://www.sxw.org.uk/computing/patches/openssh.html> to use existing [[KerberosV]] tickets for single-sign-on and automatic ticket forwarding (interesting). Note that by default this patch won't grab tickets when logging in via password - post small patch to enable this later.

30 - If you're having trouble with Ken Hornstein's AFS-Kerberos5 migration kit available at <ftp://ftp.cmf.nrl.navy.mil/pub/kerberos5/>, see <http://www.mathematik.uni-karlsruhe.de/~iwrmm/Persons/Schulz/Unix/afs/afs-krb5.html> for tips. In particular check out the Makefile patches.

41 - John Boyland has a [patch](http://www.cs.uwm.edu/~boyland/afs-krb5.patch) for Ken Hornstein's AFS Migration Kit v 2.0 that fixes some typos and includes updates suggested by other [[OpenAFS]] contributors.

48 - krb524d -- which uses a K5 TGT to produce a V4 AFS service ticket which the [[CacheManager]] needs. It does not need to run on the same machine as the [[KerberosV]] server but just needs access to the AFS principal's key. This is not needed for [[HeimdalKTH]] which implements V4 and V5 services, but is for MIT and [[ActiveDirectory]].

49 - encryption types -- this is a per key property and V5 supports several (while V4 only supported one, namely what V5 calls des-cbc-crc). However, this is not the V5 default (which I think is des3) so you need to ensure that the AFS principal uses des-cbc-crc.